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    <title>Document</title>
    <script>
        //1.检测获取字符串的长度 length
        var str = 'my name is yyqx';
        console.log(str.length);
        //2.字符串的拼接
        console.log('沙漠'+'骆驼');
        console.log('pink老师'+19);//pink老师19
        console.log('pink'+true);//pinktrue
        //+号口诀：数值相加。字符相连
        console.log(12 + 12);//24
        console.log('12'+ 12);//1212
    </script>
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